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    VERFAHREN ZUR HERSTELLUNG UND ISOLIERUNG VON 2-SUBSTITUIERTEN TETRAHYDROPYRANOLEN
    13.
    发明公开
    VERFAHREN ZUR HERSTELLUNG UND ISOLIERUNG VON 2-SUBSTITUIERTEN TETRAHYDROPYRANOLEN 有权
    方法用于生产和2-取代tetrahydropyranols的隔震

    公开(公告)号：EP2580202A1

    公开(公告)日：2013-04-17

    申请号：EP11723079.7

    申请日：2011-06-06

    Applicant: BASF SE

    Inventor： GRALLA, Gabriele ,  BECK, Karl ,  KLOS, Margarethe ,  GRIESBACH, Ulrich

    IPC: C07D309/10

    CPC classification number: C07D309/10

    Abstract: Process for the preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyrans of the formula (I) where the radical R
    1 is a straight-chain or branched alkyl or alkenyl radical having 1 to 12 carbon atoms, an optionally alkyl-substituted cycloalkyl radical having in total 3 to 12 carbon atoms or an optionally alkyl- and/or alkoxy-substituted aryl radical having in total 6 to 12 carbon atoms, comprising the reaction of 3-methylbut-3-en-1-ol of the formula (II) with an aldehyde of the formula (III): R
    1 -CHO, where the radical R
    1 has the same meaning as in formula (I) and where the reaction is carried out in the presence of water and in the presence of a strongly acidic cation exchanger, and then the isolation and/or the distillative separation is carried out in a dividing wall column or in an interconnection of (at least) two distillation columns in the form of a thermal coupling and one or more side take-off points at an absolute operating pressure of up to 500 mbar.

    VERFAHREN ZUR HERSTELLUNG M- ODER P-SUBSTITUIERTER PHENYLALKANOLE DURCH ALKYLIERUNG
    16.
    发明授权
    VERFAHREN ZUR HERSTELLUNG M- ODER P-SUBSTITUIERTER PHENYLALKANOLE DURCH ALKYLIERUNG 有权
    过程为生产或M-P-取代的苯基链烷醇烷基化

    公开(公告)号：EP2490992B1

    公开(公告)日：2014-01-29

    申请号：EP10765445.1

    申请日：2010-10-14

    Applicant: BASF SE

    Inventor： LANVER, Andreas ,  EBEL, Klaus ,  BECK, Karl ,  PELZER, Ralf ,  BOTZEM, Jörg ,  GRIESBACH, Ulrich

    IPC: C07C29/32 ,  C07C29/56 ,  C07C33/20 ,  C07C45/29 ,  C07C47/228

    CPC classification number: C07C29/32 ,  C07C29/56 ,  C07C45/29 ,  C07C33/20 ,  C07C47/228

    Abstract: The invention relates to a process for the preparation of m- or p-substituted phenylalkanols of the formula (I) in which R1 is bonded to the phenyl ring in the m- or p-position and is C1-C5-alkyl, and R2, R3, R4 and R5, independently of one another, are hydrogen or methyl, wherein an unsubstituted phenylalkanol of the formula (II) in which R2, R3, R4 and R5 have the meanings given under formula (I) is alkylated together with a C1-C5-alkyl halide of the formula (III) R1-Hal  (III), in which R1 has the meaning given under formula (I) and Hal is halogen, in the presence of a Friedel-Crafts catalyst to give an m- or p-alkyl-substituted phenylalkanol of the formula (I), then the reaction mixture is worked-up and the desired m- or p-alkyl-substituted phenylalkanol of the formula (I) is separated off, the other formed by-products are returned to the reaction mixture and these are isomerized in the presence of a Friedel-Crafts catalyst to give the desired m- or p-alkyl-substituted phenylalkanol. From the m- or p-alkyl-substituted phenylalkanols of the formula (I), it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which play an interesting role as fragrances and aroma chemicals.

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